/**
* Validate a user object.
*
* Invokes User::validate(), and additionally tests that the User's email address isn't associated with another User.
*
* @param User $user
* @return array An array of error messages, or an empty array if the User is valid.
*/
public function validate(User $user)
{
$errors = $user->validate();
$duplicates = $this->findBy(array('email' => $user->getEmail()));
if (!empty($duplicates)) {
foreach ($duplicates as $dup) {
if ($user->getId() && $dup->getId() == $user->getId()) {
continue;
}
$errors['email'] = 'An account with that email address already exists.';
}
}
return $errors;
}
